Starting with a botched attempt to reduce volatility that instead triggered a spectacular meltdown, Chinese bourses have spent the year struggling against feckless policymakers, massive capital flight and a languishing currency.
The benchmark Shanghai Composite Index (SCI) closed today down 12.3 per cent for the year, compared to a rise of 0.4 for Japan's Nikkei 225, while Hong Kong's Hang Seng index also rose 0.4 per cent.
It is a significantly worse performance than 2015's wild ride, when the SCI surged by 60 per cent in the first half before plunging by more than 40 per cent in under three months. Even so, it finished the year with an overall gain of 9.4 per cent.
Then authorities brought in a "circuit breaker" mechanism in January to automatically shut down trading if prices plunged. It went into effect twice in one week, kicking off a self-reinforcing selling panic that spread to global markets, and was scrapped after just four days.
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The chairman of the China Securities Regulatory Commission was sacked over the debacle.
His replacement, Liu Shiyu, has kept a low profile, hurting market confidence and leaving investors seeking direction, said Oliver Rui, a professor at the China Europe International Business School (CEIBS).
"People don't understand much about the regulator's policy direction," he said, adding that the lack of clarity partly explained the market's weak performance.
"When the yuan falls, market capital runs off overseas to hedge the risks," said Dickie Wong, Hong Kong-based research director for Kingston Securities, adding it also made foreign investors "less optimistic about mainland companies".
Even the year's few bright spots have failed to live up to expectations.
Earlier this month, China launched a long-delayed programme connecting its second exchange in Shenzhen - which has lost 14.7 per cent this year - with the bourse in Hong Kong.